Drill-pipe with lock-joint.



A. C.,ZIBRATH. DRILL PIPE WITH LOCK JOINT. APPLICATION FILED JUNE 19,1912.

Patented M3114, 1913.

Illmlll ".I

' 4ofwhich the following is a specification.

fback out 'any casing Which has become .and State ot" California', haveinvented a liability to' parting at the joint.

UNITED sTATEs PATENT oEEroE.l

AUGUSTUS c. ZERATH, 0F L i A 5 l DEILLFPIPE 'wrfr To all vr/wm, 'it mayconcern Be it knownthat I, 'AUGUSTUS C. ZIERATH, a citizen of thel-United States, residing at Los Angeles, in the co-unty of Los Angelesnew and useful vDrill-Pipe with Lock-Joint,

The main objectef the present invention is to provide a drill pipe foruse in rotary drilling in which the rotary strain is taken by apositivelock joint so that' no rotary strain isbrought on the 'screw couplingfor the joint."

A further object 'of the invention is to provide a. drill pipe with lockjoint that can be used t0 rotate vthe drill and line of pipe in eitherdirection, right or left,jw'i`thout A further vobject of thel inventionis 'to' provide a drill pipefwhichcanv be used to lodge'din thewellgwithou't the necessity of puttingin a reverse or left-handed threadPipe. L

A further object of the invention is to maintain the'full strength ofthe drill pipe 'at the joint and to reinforce said pipe at the jointinstead of diminishing its (strength. 1 A further object of theinvention to; provide improved means for'securing the bit to the rotaryAdrill pipe ink such manner that `it will not back o" in turning the bitin reverse direction.

FurtherY objects of the pear hereinafter. u

The accompanying drawings illustrate embodimentsof my invention, andreferring thereto:

Figure l is a side elevation of the lower portion of the drill pipe.)Fig. 2 is a side elevation partly in section of a portion of the pipeat'a joint. Fig. 3 4is a section on line ava-w3 in Fig. 2. Fig. 4 is aysection on line L-f in Fig. 2. Fig. 5 isa section on line 5-5 in Fig.2. Fig. 6 is a perspective 'of the members of a joint With an adjacentpipe portion in detachedpo'sition. Fig. 7 is a vertical section vpart-lyin elevation of .the bit and the joint therefor. Fig. 8 is a section Qnline mfes in Fig. 7. Fig. 9 is a perspective of the bit with itsattaching. or joint member. '-Fig. 10' is a vertical sec-v tion of ajoint used in connection Wit-h square drill pipe. Fig. 11 'is a sectionon lline mn-n in Fig. 10. Fig. 12 isza section on line acm-#m22 in Fig.10.

vinvention rwill ap- Speciflcation of Letters Patent.`

l applicati@ med June 1a, 1912. serial 110.7043675.

vthe coupling member. may extend through thel projecting portions 0SANGELES` CALIFORNIA.

H LOCK-JQINT.

Patented Mar. 4, 1913.

The rotary drill pipe comprises pipe sec tionsl which are preferablymade someu what heavier than the ordinary drill pipe and which areformed with .rivet holes l near their upper and lower ends and vvithcut-away portions or notches 3 in their upper and lower ends formingintervening teeth or projecting portions 4. Each lpipe section at eachend thereof is provided' with an attaching or coupling member rigidlysecured thereto. The coupling member at the bottom of each pipe sectionmay consist vof a sleeve or tubular body 5 Whose upper end portion 7 isof 'proper'diameter to lit tightly Within the pipe section, the'bodyport-ion of said sleeve being enlarged beloiv said upper end portion 7and said enlarged body portion being provided Witharc-shaped recesseslor vchannels l0 to receive and fit the pro' jecting -portions `4-ofIthe pipe section. Rivets indicated at 12 ext-ending through theperforations 2 in the pipe vsection and through the upper portion 7 ofthe coupling.

member,` rigidly secure the' pipe section to Additional rivets 12 4 ofthe section and throughthe body portion 5 .of the coupling memhertofurther secure the parts together. The upper end of each pipe'section isprovided With a coupling member rigidly securedz theretoand comprising alower` portion vl4itting Within the pipe section and a body `portion"'15 formed with' arc-shaped grooves 16l tting the projections 4 at theupper end of the pipe section, the parts beingsecured together by rivets17 extending through the pipe section and through the portions v14` and15 of the coupling member. The portion 15 ofthe coupling member may bepro-- vided with an enlargement or shoulderl8. forming-an elevatorcollar.

The upper and lower coupling memh 5 and 15 are provided at their endswhich are farthest from the pipe sections lwith in terengagingprojections .and slots, each of sai/d members having, for example,diametricrlly opposite projections 2O with intervening slots 21 so thatWhen said members are placed togetherl end to end, the projections 20"ef'eachmember will ft in the slots 21 of theother member. Theseinterengaging portions.of the joint members constitute a lock givingapositive rotative connectin between the members Without dependf ence onany screw thread. The coupling members 5 and 15 are further providedwith screw threaded portions 24 extending out- 'Wardly from the bodyportions of the said members, so that the screw threaded cou-l plingsleeve 25 may screw over the screw threads 24 and clear the peripheriesof the coupling members.

In coupling the pipes at a joint, the sleeve 25 is first screwed up toposition shown in dotted lines in Fig. 2, so that it will be clear ofthe lock joint. The coupling members are then brought together so as tointerengage and interlock by their respective projections -and recessesv20 and 21, and the coupling 'in the same manner as above described, the

construction being otherwise as above stated.

An important feature of the present iny vention is the ability to rotatethe drill pipe in either direction, right or left, and in thisconnection it is essential to provide a bit which can be rotated ineither direction without backing off of the drill pipe. For this purposeI provide a joint -between the drill pipe and the lowest pipe sectionwhich is similar to that above described, the bit indicated at 35 havinga solid shank 36 fitting within the lower end of a coupling member 37which is channeled as at 38 to receive projecting portions 39 on acylindrical sheath 40 which is formed integrally with the body of thebit and extends'upwardly around the lower end portion of the, couplingmember. The coupling member aforesaid is provided with an elevatorcollar42 and with lock joint portions 43 similar to the corresponding partsabove described and is secured to the bit -35 by means of rivets 12.

Shank'36 has passages 36 :tor passage of water.

I What I claim is:

1. A rotary drillin'g pipe comprising a plurality of sections, eachprovided at each end with coupling members, said coupling members havingprojections for interlocking, to couple the members against rotarystrain, a screw sleeve screwing on said coupling members to hold themtogether, each couplingmember consisting of a tubular body having anextension tting in the adjacent end of a pipe section, each end of eachpipe sect-ion having projections, and the adjacent portions of thecoupling member being recessed to receive and fit said projections onthe pipe sections, and said pipe sec` tions being riveted to saidcoupling members.

2. In combination witha rotary drilling pipe section, provided at itslower end with a coupling member, of a bitl having a shank and a tubularsheath surrounding said shank, and having projections and a couplingmember fastened to said sheath and extending between said shank andtubular sheath, and channeled to receive the proj ections on saidsheath, and 4means for securing said coupling members together.

3. A pipe 'section for a rotary drilling Apipe having a coupling memberat each end,

said coupling member being tubular and provided with arc-shaped grooves,and said ipe sections having projections extending into and fitting insaid grooves, said pipe sections being riveted to said tubular couplingmember.

In testimony whereof, I have hereunto set my hand at Los Angeles,California this 14th day of June, 1912.

AUGUSTUS C. ZIERATH. In presence of-` ARTHUR P. KNIGHT, MARTHA M.'LANGE.

